SetInterval 函数不会在 Javascript 代码中产生延迟

Question

Hi Everyone I am having trouble using the setInterval function. I have it set to 10 seconds in each of the situations below, however the functions inside are executing as fast as they normally would. I am new to javascript could someone tell me what I am doing wrong?

setInterval(function() {
  if (tempArray.length == 4) {

    var counter = 0;
    var sum = 0;
    //console.log("counting average...");

    for (var i = 0; i < tempArray.length; i++) {
      sum += tempArray[i]; //add each temperature together 
      counter++;
    }
  }

  var average = (sum / counter).toFixed(2);
  setInterval(function() {
    var avgString = "Data reveived, the average temperature is " + average + "*C";


    console.log(avgString);
    io.emit('chat message', avgString);
  }, 10000);
}, 10000);

Answer 1

 var tempArray = [1, 2, 3, 4, 5]; var counter = 0; var sum = 0; var average = 0; setInterval(function() { //console.log("counting average..."); tempArray = [ Math.random() * 10, Math.random() * 10, Math.random() * 10, Math.random() * 10, Math.random() * 10 ]; for (var i = 0; i < tempArray.length; i++) { sum += tempArray[i]; //add each temperature together counter++; } average = (sum / counter); setTimeout(function() { var avgString = "Data reveived, the average temperature is " + (sum / counter) + "*C"; console.log(avgString); }, 1 * 1000); }, 1 * 2000);